Roger Federer plays close friend Jurgen Melzer in the fourth round of the US Open on Monday.

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Federer has not dropped a set so far and is looking forward to playing the Austrian who's enjoying the best year of his career, having made the semi-finals of the French Open. However he will be up against it playing Federer who dispatched him in straight sets at Wimbledon.

Federer coped brilliantly in very difficult conditions against Paul-Henri Mathieu on Saturday, with gusts of wind (a result of Hurricane Earl), reaching up to 35 mph on court.

However Federer stressed that even in those conditions it's important to go for your shots. “If you just play soft into the court, as well, it's kind of tricky then to measure the ball well and let the other guy dictate play. You just go with the pace of the other guy. It's not so easy to create pace when it's so windy. So sometimes, you try to just hit a slow ball in there and see what happens. It's uncomfortable for the opponent, but it's just not the way to go in men's tennis. Guys have too much power.”

“Once the other guy figures you out, how you're playing, if you're just really pushing the ball in play, it's so hard from going, playing like that to playing offensive again. It's almost like a thing of impossibility. You have to hit the ball otherwise it's not a good thing.“  

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